Leopard Gecko

The leopard gecko (Eublepharis macularius) is one of the most beginner-friendly reptile pets available, partly because — unlike most lizards — it has movable eyelids and lacks the adhesive toe pads that allow other geckos to climb glass, making escape far less likely. A non-obvious fact that surprises many owners: leopard geckos are crepuscular to nocturnal insectivores that originate from arid scrubland in Pakistan and Afghanistan, meaning they require a specific thermal gradient and cannot thrive under the same husbandry used for tropical reptiles like bearded dragons.

Essential Products & What to Look For

• Enclosure: A 20-gallon long tank (30 × 12 × 12 inches) is the minimum for a single adult. Under-tank heaters (UTH) paired with a thermostat are the preferred primary heat source — belly heat is how leopard geckos thermoregulate and digest food. The Association of Reptilian and Amphibian Veterinarians (ARAV) warns against heat rocks, which have inconsistent surface temperatures and cause thermal burns.
• Thermal gradient: Maintain a warm hide at 88–92°F, a cool side ambient of 75–80°F, and a nighttime low no colder than 70°F. Use a digital probe thermometer, not a stick-on dial gauge — dial gauges are inaccurate by up to 10°F. Temperature accuracy is not cosmetic: improper temperatures cause digestive shutdown and chronic illness.
• Substrate: Juvenile leopard geckos should be kept on paper towels or reptile carpet. Adults can be transitioned to a bioactive substrate mix of 70% topsoil and 30% sand, but loose sand for juveniles causes fatal intestinal impaction. Avoid calcium sand entirely — the ASPCA notes it does not prevent impaction and creates a false sense of safety.
• Supplementation: Dust feeder insects with calcium + D3 powder at every other feeding and a multivitamin supplement once weekly. Consistent supplementation is the single most direct prevention against metabolic bone disease (MBD).

Health & Preventive Care

Metabolic bone disease (MBD) is the most common preventable illness in captive leopard geckos, caused by calcium deficiency, inadequate vitamin D3, or improper temperatures that prevent calcium absorption. Signs include soft or curved limbs, trembling, difficulty walking, and a rubbery jawbone. If your gecko's limbs appear bowed, it trembles while walking, or it cannot grip a surface, see a reptile-experienced vet within a week — early MBD is largely reversible; advanced MBD causes permanent deformity. ARAV practice guidelines recommend annual fecal parasite screens for all captive-kept reptiles, as cryptosporidium and pinworms are common in leopard geckos sourced from large breeding operations.

Tail autotomy — voluntary tail loss when the gecko feels threatened — is a natural defense mechanism. A dropped tail will regenerate, but the replacement is made of cartilage and lacks the original's banded pattern. The AVMA notes that a gecko that drops its tail loses a significant fat reserve; ensure the animal continues eating normally during regrowth. A gecko that consistently drops its tail is under chronic stress, and husbandry should be reviewed.

Enrichment & Daily Routine

Leopard geckos are low-energy animals, but this does not mean they require no enrichment. Provide at least three hides: a warm hide over the heat mat, a cool hide, and a humid hide lined with damp sphagnum moss on the cool-to-middle zone. The humid hide is critical for shedding — retained shed (dysecdysis) on toes cuts off circulation and causes digit loss within days. Mist the humid hide substrate every 2–3 days rather than misting the whole enclosure, which raises ambient humidity too high for a desert species. Feed adults every 2–3 days in the evening, using appropriately sized prey (no wider than the space between the gecko's eyes): primarily crickets or dubia roaches, with mealworms as a supplement rather than a staple due to their high fat content. Handling sessions of 10–15 minutes, 3–4 times per week, support tameness without causing undue stress.

Common Mistakes to Avoid

• Myth: Leopard geckos thrive on mealworms alone. Mealworms are high in fat and phosphorus, which inhibits calcium absorption over time — feeding them as a primary diet item is a direct pathway to MBD. Crickets and dubia roaches are nutritionally superior staple feeders; mealworms should make up no more than 20–30% of the diet.
• Myth: UVB lighting is unnecessary for leopard geckos. While leopard geckos can survive without UVB due to their crepuscular habits, Reptile & Amphibian Ecology International and current ARAV recommendations support low-level UVB exposure (2–5% UVB, T5 HO fixture) as beneficial for D3 synthesis and behavioral health, particularly in setups where supplementation consistency is hard to maintain.
• Mistake: Cohabitating two male leopard geckos. Males are territorial and will fight, causing severe bite wounds, stress, and suppressed immune function. A single gecko or a one-male, multiple-female group are the only appropriate social configurations, and even female groups must be monitored for competition over hides and basking spots.

This guide is for informational purposes only and does not replace professional veterinary advice.